<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="./js/vue.js"></script>
</head>

<body>
    <div id="app">
        <input type="text" v-model="msg">
        <!-- 使用过滤器 -->
        {{msg|upperCase|asterisk}}
    </div>
    <script>
        Vue.filter('upperCase',function(val){
            return val.toUpperCase();
        })
        Vue.filter('asterisk',function(val){
            var reg = /\d/g;
            return val.replace(reg,'*');
        })
        var app = new Vue({
            el: '#app',
            data: {
                msg: ''
            }
        })
    </script>
</body>

</html>